PowerPoint Presentation

The Bartlett Baby Boom: An Inventory of Germinants Following a Mast Year

Alani Grace GrantNew York University 2012Open with hypothesis1MOTIVATIONOver the last three decades, sugar maple has declined in the northern hardwood forests

At the same time, American beech has increased

Hane (2003) has linked sugar maple decline to an increase of understory beech due to BBDDoes beech sprout and mastSM has been on decline due to acid rain and secondary pathogensBbd and2HYPOTHESESThere will be a greater amount of beech germinants than sugar maple germinants present in older stands

Sugar maple decline is related to increased presence of beech saplings

Beech Bark Disease positively influences mast seed productionPull up BBD from each stand- germinant production of beech related to beech bark disease

Describe germinants by site; as a function of stand age yes

Add some intro slides, pictures of germinants, and background on why were interested in them.

The hypotheses might be easier to understand if they were state more simply.

I dont know how to read S1 and S2!

Is there supposed to be a gray bar at the top of the slide? Its distracting.3

Acer saccharumFagus grandifoliaPhotographs courtesy of Matt VadeboncoeurAdd scientific names 4Total Germinant Species Composition

Change Colors

Be more descriptive of sites and the age Reference species age NOT MAST YEAR AT ALL SITES

Comments: too clustered, maybe take out the birch countComments on S3: The graph formats itself. I did not omit anything except for the extremes of the birch data. All of the measurements for each stand is there: i.e. C1: Ca, Control, N&P, N, and P are all there, however I cannot format it to display the individual plots. Current graph is altered and has no birch

Ruth: Try a log scale. You can probably even include the outliers.5Germinant Abundance Correlates with Adult Abundance in Sugar Maple and Beech

CHANGE GRAPH NO LOG Comment: Put in regression line and equationTransformation in excel

Ruth: Here it is! The response variable is normally on the y axis, so transpose this. Also try the log transformation (or just tell Excel to diplay log scales on one or both axes).6Stands with Greater BBD have Greater Germinant Abundant

PERCENT OR AVERAGE*7Lower Sugar Maple Germinant Abundance in Stands With More Beech Saplings

TAKE off log scale 8Next StepsRevisit sites and count surviving germinants

Compare survival by species

Examine effect of fertilizer on germinant survivalIm not sure about the second point, you can explain it when we practice.

SURVIVAL BY SPECIES Survival will be a better predictor of an imbalance between sugar maple and beech understory composition.9Ruth Yanai SUNY-ESFShinjini Goswami Miami UniversityMatt Vadeboncoeur UNHKikang Bae SUNY-ESFShoestring Summer Crew Members

Selected References DiGregorio, L; Krasny, M; Fahey, T. (1999). Radial Growth Trends of Sugar Maple (Acer saccharum) in an Allegheny Northern Hardwood Forest Affected by Beech Bark Disease. Journal of the Torrey Botanical Society, 245-254.

Hane, E. (2002). Indirect effects of beech bark disease on sugar maple seedling survival. Canadian Journal of Forest Research, 807-813.

Horsley, S; Long, R; Bailey, S; Hallett, R; Wargo, P. (2002). Health of Eastern North American Sugar Maple Forests and Factors Affecting Decline. Northern Journal of Applied Forestry, 34-44.

Juice, S; Fahey, T; Siccama, T; Denny, E; Eagar, C et al. (2006). Response of sugar maple to calcium addition to northern hardwood FOREST. Ecology, 1267-1280.

United States Department of Agriculture. (1990). Silvics of North America. Washington, , D.C.: U.S. Department of Agriculture.

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PCBASSSPRUCEMMHEMASPASHVIBSTMRMSMBEBIRCH

Sheet1Column1Column2PCBASSSPRUCEMMHEMASPASHVIBSTMRMSMBEBIRCHC1Ca00101000000092Con00000000010026N&P00000020010034N00001000010011P00001000100042C2Con0000300032700129N&P000041000290075N000000001180042P0000120003530030HBMCon0000035017070294N&P00000210170212290N0010040011142184P000009010050254JBMCa0001000010107091Con0000000800430139N&P0015000100393156N0000004010210425P0001102410340132C4Con000000003544393N&P000000206223039N00000000461046P10000000216017200C6Ca0000001161931131222Con00000000753141238N&P000000006128165274N0010101015555188P10000000322644206JBOCa000101000000303Con000000100000296N&P000000000001631N000101000004648P000100000000297HBOCon0000062000213537N&P00000192020513865N000005059006242805P0000020000216710C9Con000000101171965126N&P0000000032227146165N00000000257974717P00000010324337234C8Con03000012022166428529N&P000000105462141001529N0000001400267335242P0000400211012014622

Chart1000020812521778567322984376615324450

BESMAdults > 10 cmGerminant Count

Sheet1BE GerminantBE AdultSM GerminantSM Adult040002300203081128352161778131567543227698684437186680151232244395230211BE GerminantBE AdultSM GerminantSM Adult040002300203081128352161778131567543227698684437186680151232244395230211

Chart1002012177832246635

BE GerminantAverage BBD Score Across StandsBeech Germinants

Sheet1Average of BBD ratingBE Germinant2.3002.2302.15202.38123.6317783.183222.3343.06663.0032.095

Chart1303294215167585136414815

BE SaplingsBeech 2-10 cm CountSugar Maple Germinant Count

Sheet1StandBE SaplingsSM GerminantsC13030C22940C42158C616752C858567C95198HBM3637HBO4115JBM48244JBO150